Details of VAR-202102-1414

ID

VAR-202102-1414

CVE

CVE-2021-27171

TITLE

FiberHome HG6245D Out-of-bounds write vulnerability in device

Trust: 0.8

sources: JVNDB: JVNDB-2021-003399

DESCRIPTION

An issue was discovered on FiberHome HG6245D devices through RP2613. It is possible to start a Linux telnetd as root on port 26/tcp by using the CLI interface commands of ddd and shell (or tshell). FiberHome HG6245D The device contains an out-of-bounds write vulnerability.Information is obtained, information is tampered with, and service is disrupted (DoS) It may be put into a state. FiberHome HG6245D devices is a router of China FiberHome. Provide network connectivity function. A buffer overflow vulnerability exists in FiberHome HG6245D devices, which can be exploited by attackers to cause buffer overflow or heap overflow

Trust: 2.16

sources: NVD: CVE-2021-27171 // JVNDB: JVNDB-2021-003399 // CNVD: CNVD-2021-18376

IOT TAXONOMY

category:

['Network device']

sub_category:

Trust: 0.6

sources: CNVD: CNVD-2021-18376

AFFECTED PRODUCTS

vendor:	fiberhome	model:	hg6245d	scope:	lte	version:	rp2613	Trust: 1.0
vendor:	fiberhome group	model:	hg6245d	scope:	lte	version:	hg6245d firmware rp2613 until	Trust: 0.8
vendor:	fiberhome group	model:	hg6245d	scope:	eq	version:	-	Trust: 0.8
vendor:	fiberhome	model:	hg6245d devices	scope:	-	version:	-	Trust: 0.6

sources: CNVD: CNVD-2021-18376 // JVNDB: JVNDB-2021-003399 // NVD: CVE-2021-27171

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2021-27171
value:	CRITICAL
Trust: 1.0
NVD:	CVE-2021-27171
value:	CRITICAL
Trust: 0.8
CNVD:	CNVD-2021-18376
value:	HIGH
Trust: 0.6
CNNVD:	CNNVD-202102-988
value:	CRITICAL
Trust: 0.6

nvd@nist.gov:	CVE-2021-27171
severity:	HIGH
baseScore:	10.0
vectorString:	AV:N/AC:L/AU:N/C:C/I:C/A:C
accessVector:	NETWORK
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	COMPLETE
integrityImpact:	COMPLETE
availabilityImpact:	COMPLETE
exploitabilityScore:	10.0
impactScore:	10.0
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 1.8
CNVD:	CNVD-2021-18376
severity:	HIGH
baseScore:	10.0
vectorString:	AV:N/AC:L/AU:N/C:C/I:C/A:C
accessVector:	NETWORK
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	COMPLETE
integrityImpact:	COMPLETE
availabilityImpact:	COMPLETE
exploitabilityScore:	10.0
impactScore:	10.0
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.6

nvd@nist.gov:	CVE-2021-27171
baseSeverity:	CRITICAL
baseScore:	9.8
vectorString:	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
attackVector:	NETWORK
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	HIGH
integrityImpact:	HIGH
availabilityImpact:	HIGH
exploitabilityScore:	3.9
impactScore:	5.9
version:	3.1
Trust: 1.0
NVD:	CVE-2021-27171
baseSeverity:	CRITICAL
baseScore:	9.8
vectorString:	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
attackVector:	NETWORK
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	HIGH
integrityImpact:	HIGH
availabilityImpact:	HIGH
exploitabilityScore:	NONE
impactScore:	NONE
version:	3.0
Trust: 0.8

sources: CNVD: CNVD-2021-18376 // JVNDB: JVNDB-2021-003399 // CNNVD: CNNVD-202102-988 // NVD: CVE-2021-27171

PROBLEMTYPE DATA

problemtype:	CWE-787	Trust: 1.0
problemtype:	Out-of-bounds writing (CWE-787) [NVD Evaluation ]	Trust: 0.8

sources: JVNDB: JVNDB-2021-003399 // NVD: CVE-2021-27171

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202102-988

TYPE

buffer error

Trust: 0.6

sources: CNNVD: CNNVD-202102-988

PATCH

title:	Top Page	url:	http://www.fiberhome.com/default.aspx	Trust: 0.8
title:	Patch for FiberHome HG6245D devices buffer overflow vulnerability	url:	https://www.cnvd.org.cn/patchInfo/show/253656	Trust: 0.6
title:	Fiber Buffer error vulnerability fix	url:	http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=142314	Trust: 0.6

sources: CNVD: CNVD-2021-18376 // JVNDB: JVNDB-2021-003399 // CNNVD: CNNVD-202102-988

EXTERNAL IDS

db:	NVD	id:	CVE-2021-27171	Trust: 3.0
db:	JVNDB	id:	JVNDB-2021-003399	Trust: 0.8
db:	CNVD	id:	CNVD-2021-18376	Trust: 0.6
db:	CNNVD	id:	CNNVD-202102-988	Trust: 0.6

sources: CNVD: CNVD-2021-18376 // JVNDB: JVNDB-2021-003399 // CNNVD: CNNVD-202102-988 // NVD: CVE-2021-27171

REFERENCES

url:	https://pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#telnet-cli-privilege-escalation	Trust: 2.4
url:	https://nvd.nist.gov/vuln/detail/cve-2021-27171	Trust: 1.4
url:	https://pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#telnet	Trust: 0.6

sources: CNVD: CNVD-2021-18376 // JVNDB: JVNDB-2021-003399 // CNNVD: CNNVD-202102-988 // NVD: CVE-2021-27171

SOURCES

db:	CNVD	id:	CNVD-2021-18376
db:	JVNDB	id:	JVNDB-2021-003399
db:	CNNVD	id:	CNNVD-202102-988
db:	NVD	id:	CVE-2021-27171

LAST UPDATE DATE

2024-11-23T22:44:15.794000+00:00

SOURCES UPDATE DATE

db:	CNVD	id:	CNVD-2021-18376	date:	2021-03-18T00:00:00
db:	JVNDB	id:	JVNDB-2021-003399	date:	2021-10-26T07:20:00
db:	CNNVD	id:	CNNVD-202102-988	date:	2021-03-09T00:00:00
db:	NVD	id:	CVE-2021-27171	date:	2024-11-21T05:57:28.250

SOURCES RELEASE DATE

db:	CNVD	id:	CNVD-2021-18376	date:	2021-03-18T00:00:00
db:	JVNDB	id:	JVNDB-2021-003399	date:	2021-10-26T00:00:00
db:	CNNVD	id:	CNNVD-202102-988	date:	2021-02-10T00:00:00
db:	NVD	id:	CVE-2021-27171	date:	2021-02-10T19:15:15.057